Steam-boiler furnace.



E. BUGKLEYI STEAM BOILER FURNACE. AIPLIQATION 1ILED MAY 27, 19121,@5L5%fi Patented Ja'n.28, 1913.

20mm w i /LL A I hurrah s'rarns Parana oFFroE.

ERNEST BUCKLEY, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TOSAVILLE SMITH, 0F PHILADELPHIA, PENNSYLVANIAQ STEAM--I3OILER FURNACE.

Specification of Letters Patent.

Patented Jan. as, 1913,

Application filed May 27,-1912. Serial No. 699,914.

To all whom it may concern:

Be it known that I, ERNns'r BLoxLnY, a Sub ect of the King of GreatBrltain and 'Ireland, residing in Philadelphia, Pennsylvania, haveinvented certain Improvements in SteanrBoiler Furnaces, of which thefollowing is a specification.

The obiect of my invention is to insure the proper combustion of thegases discharged from the fuel in steam boiler furnaces, an object whichI attain in the manner hereinafter set forth, reference being had to theaccompanying drawing, which represents a longitudinal vertical sectionof a boiler of the locomotive type having combustion devices inaccordance with my invention.

In the drawing, 1 represents the barrel or casing of a boiler of thelocomotive type, 2 the tire box casing, 13 the smoke box casing, 4 thestack, 5 the tubes, and 6 the grate, all of these parts beingconstructed and arranged in the ordinary manner. Surrounding the boilershell, however, is an outer casing 7 which is supported and braced atsuitable points by m ans of perforated rings 8 and has, in its forwardend, openings 9 for the inlet of air into the chamber 10 whichintervenes between the boiler shell and said outer casing 7, this airchamber conununicating at its rear end with a chan'iber ll in a hollowbrick arch 12, which projects inwardly into the fire box and is locatedat a point some distance above the level of the bed of fuel maintainedupon the grate. (i, the lower member of this arch 12 being perforated asat 13- for the escape of the air therefrom into the fire box. Thechamber 10 also eon'nnunicatcs with the interior of the fire box througha hollow door 14 which closes the usual teed opening into the tire box,this door being pivoted at the top in such manner as to swing inwardlyin order to open itv The air entering the front end of the chamber 10 istherefore caused to circulate lirst around the shell 3 of the smoke boxand then around the shell of the boiler; and in its rearward travelbecomes highly heated and hence issues from the hollow arch 12 andhollow tire door 14 in the condition best calculated to cause effectivecombustion of the gases arising from the fuel upon the grate t5, thelatter receiving its supply of cold air from below in the customarymanner, and the heated air constituting a secondary supply which isdirected downwardly toward the surface of the bed of fuel andconsequently becomes intimately mixed with the gases arising therefrom,which mixture is completed as the gases are concentrated in their upwardpassage around the rear end of the arch so that by the time the gasesreach the upper portion of the tire box the oxygen of the secondary airsu ply has been so thoroughly eommingled tlierewit-h that all of thecarbon contents of the gases will have become ignited and completecombustion of the gases will be effected either in the upper portion ofthe tire box or during the passage of said gases through the tubes 5,the emission of unconsumed carbon in the form of smoke and the loss ofheat due 'to this cause being prevented. a

l. have not. shown the usual stays for the side walls and crown sheet ofthe fire box as such illustration is not necessary for the properunderstanding of my invention;

1 claim:

The combination, in a steam'boiler furnace, of a tire box having thereina deflect ing arch containing a chamber discharging into the tire box, atire door with passage thcrcthrough also discharging into the fire box,a casing outside of the shell of the boiler and forming between the twoan air heating and circulating chamber which com- 8 municates both withthe hollow arch and with the passage through the tire door, whereby asecondary supply of air heated by contact with the shell of the boileris directed into the fire box partly through the hollow arch and partlythrough the fire'door.

In testimony whereof, I have signed-my name to this specification, inthe. presence of two subscribing witnesses.

ERNEST BUCKLEY. lVitnesscs:

ELSIE FULLER'IUN, Ilannr/roN l). TUnNnu.

